DVR RDK Capture

Hi, I use DVR RDK2.8 in my own board.

Now the VIP0 A is enable. But in FVID2_dequeue(pObj->fvidHandleVipAll, &frameList, streamId, BIOS_NO_WAIT), the frameList.numFrames is 0.

I set pCaptureInstPrm->inDataFormat       = SYSTEM_DF_RGB24_888;

what's wrong? Anybody can help me???